新驾驶员所出的事故是老驾驶员的两倍。
New drivers have twice as many accidents as experienced drivers.
尽管没有新煤矿投产，但 Tribnia 每个矿工的煤炭产量是五年前的两倍。
Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened.
具体来说，AT&T 将增加2000个新基站，升级现有基站的光纤连接数量是2009年的三倍。
Specifically, AT&T will add 2,000 new cell sites and upgrade existing cell sites with three times more fiber links than it had in 2009.
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